DESIGN AND TECHNOLOGY - filestore.aqa.org.uk
Metals are welded using gas e.g. oxyacetylene using a very hot flame or MIG and TIG welding using a large electrical current to create heat and fuse metals together. Polymers can be fused using either heat or chemicals. Chemical welding e.g. Tensol and solvent cement are common in school environments. Heat welding involves using a hot air gun and
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